Snowplow



D. A. SARGENT SNOWPLOW Nov. 10, 1925.

5 nM TM y m M m ...1 HQ 00 M O N T R a S N o Patented Nov. 10, 1925.

UNITED STATES PATENT-OFFICE.

DON A. SARGEN T, BANGOR, MAINE, .ASSIGNOR T0 NORTHERN TRAILER COMPANY,

OF BANGOR, MAINE, A CORPORATION OF .MAINE.

sNowrLow.

Application filed April 12, 1924. Serial No. 706,011.

To all whom it may concern:

Be it known that I, DoN A. SARGENT, a citizen of the United States, residing at Bangor, in the county of Penobscot, State of Maine, have invented certain new and useful Improvements in Snowplows; and I do hereby declare the following'to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

In my copending application, Serial No. 658,485, I have described and claimed a snow plow designed to be operatedby a tractor.

\ This plow is-equipped with a V-shaped nose behind which, and on either side, wings are universally pivoted and provided with means for varying their angular position in both the horizontal and vertical planes.

These wings are used to pile the plowed snow along the side of the out and also, by,

properly balancing the effects of-the snow reaction, to hold the nose against the snow bank when the plow is acting to widen a out already made. As shown in my earlier application the points about which the forward ends of these wings are pivoted are fixed. I

I have discovered that when working in heavy snows the snow )ressure has a tendency to .swing the wings upwardly and inwardly so thatin order to insure proper functioning of the wings it has sometimes been found necessary to weight their outer ends. Ordinarily this is done by placing a man on the wings adjacent the hoisting chains, which procedure is unsatisfactory. It is the object of the present invention to provide other means for overcoming the disturbing effect of this inward and upward thrust of heavy snows against the wings of a snow plow. The present invention is based upon a. discovery which I have made that this action of the snow in deflecting the wings inwardly and upwardly, unless weighted, can be counteracted b raising the forwardends of the wings. I ave accordingly mounted the pivot points of the wings adjustably and provided means operable from the rear end of the plow for varying the position of the pivots to meet varying conditions.

In order that the invention may be more clearly understood, I have illustrated a preof the wing elevating mechanism taken along line 3-3 of Fig. 2; and FigA is a transverse section of the same mechanism taken along line 4-4 of Fig. 3.

The plow, its draft mechanism and various related parts are shown in full lines in Flg. 1, the tractor being shown in dotted lines. The plow is provided with a V- shaped, suitably reenforced nose 1, the sides or shares of which are made concave so that the snow is rolled, not pushed, to the side of the road. Extending rearwardly from this nose, is a frame designed to receive a tractor, comprising side members 2, rigidly secured to the nose by means of angle irons 3. The rearend of the frame is completed by means of a transverse draw bar 4:, through which the plow is drawn by the tractor. Within the frame, and designed to support both it andthe nose, is a sled comprising two runners 5 connected at their forward ends by means ofa cross bar 6. The frame is pivotally connected to the sled at the two points 7. Near the forward end of the runners 5, two uprights v8 arise and are connected overhead by cross bar 9. The inner faces of these uprights are designed to contact with chafing blocks (not shown) secured to the sides of the tractor. Near the rear end of the frame are-situated a pair of double uprights 12, which, like the ends by means of a bar 13. The width of the plowbetween the runners 5, the length from the cross bar 6 to the draw bar 4, and the height from the cross bars 9 and 13 to the ground are suiiicient to permit the entr' I of a tractor, the plow being, of course, mad: in various sizes suitable for difi'erent size tractors.v The draw bar is held in place between two pairsof angle irons 14;, one pair secured to theouter face of each side member 2 near the rear end thereof. A bolt 15 passes through the flanges of these angles and the ends of the draw her. To reenforce the structure, I have placed these angles adjacent the rear uprights 13, so that *in use transmitted through the frame at the point where it is reenforced by these uprights. As the draw bar must necessarily be removable to permit the entry and exit of the tractor, the bolts 15 may be readily withdrawn to enable the bar to be slid outwardly from between the angle irons 14.

Behind the nose 2. pair of wings 16 are. pivoted upon universal pivots 17 These wings extend for substantially the length of the frame, and like the nose, are suitably curved to roll the snow. The outer ends of the Wings are supported by means of chain falls 18, the upper blocks of which are secured to the outer ends of the cross bar 13. These chain falls not only support the outer end of the wings, but hold them in any desired angular position, as will be obvious. Lateral adjustment of the wings is effected and maintained through bars 19, loosely pivoted at 20 near the outer ends of the wings. These bars are provided with suitably spaced holes or slots 21 designed to fit over projecting studs 22, which extend from and are integral with the upper angle irons 14 of the pins which hold the draw bar. These bars 19 are made strong enough to resist the snow pressure against the wing.

In order to counteract the tendency of heavy snows to swing the wings inwardly and upwardly, I have, in accordance with the present invention, mounted the universal pivots 17 for vertical movement. To this end I have secured one element of each uni versal pivot to a block 23 which is integral with a rack 24. Ihis block and its rack are slidably mounted within a guideway 25 cut in a channel 27 fixed to one of the side members 2 of the frame. J ournaled within this channel and meshing with the rack is a pinion 28 fixed upon the end of a rod 29, which extends rearwardly along the side of the frame. Each of these rods 2-9 is provided near its rear end with a gear 30 which engages with. a pinion 31, fixed upon the end of a second rod 32- supported by the upright 12 and terminating in a handle or handwheel 33., I

The manner of adjusting the forward ends of the wings will be obvious from the foregoing. The operator by turning the handle 33, through pinion 31 and gear 30 turns the pinion 28, and causes the rack 24 and the block 23 to move up and down within the guideway' 25, thus raising and lowering the pivot 17. In order to limit this movement, I have provided the channel with a stop 34, and the rack with a stop 35. The pivoted wings may be held in adjusted position by any desired locking means if necessary.

By means of the mechanism just described, it is a simple matter for the operator to raise or lower the forward ends of the wings and thus counter-act the tendency of the wings to swing inwardly and upwardly when the plow is working in heavy snow. It is, of course, to be understood that other mechanism might be employed to accomplish this same result.

I claim 1. A. snow plow comprising the combina ("ion of a nose, a wing pivotally mounted behind the nose, means for raising and lowering the pivot point and holding it in fixed position, and means operablejfrom the rear of the plow for operating the raising and lowering means. R

2. A snow plow comprising the combination of a Vshaped nose, 2. rearwardly extending frame secured thereto and designed to receive a tractor, wings pivotally mounted on theframe behind the nose, guideways on the frame, racks secured to the pivots and slidable in the guideways, pinions journaled in the guideways engaging the racks, rods fixed to the pinions extending to the rear of the frame, and means situated at the rear of the frame for turning the rods to raise and lower the pivots.

In testimony whereof I afiix my signature.

DUN A. SARGENT. 

